Branching constructs can involve many kinds of comparisons among variables and constants of all types:

When an if clause has only one statement, a shorter form may be used:

Here's an example of a more complicated logical expression with ordering:

Let's look at some loop examples. A do-loop does not need to have a loop variable (and boundaries) at all and may be exited at any time with the exit statement. The exit statement may be placed anywhere in the loop, most often within an if statement. Placement at the end of the loop results in an until-loop, and placement at the beginning results in a while-loop. It may therefore be argued that the do-exit construct is more flexible than the usual do-while.

Example: Break from the loop anywhere

Example: Repeat until the condition is true

Example: Do while the condition is true

The exit statement may also appear in a loop with a loop index:

Loop iterations may be skipped by using the cycle statement. When a cycle statement is executed, the next loop iteration is started immediately. In the example below, the variable x is incremented 25 times, but the y increment is skipped for the fifth iteration of the loop: